# Vibration analysis vs Pocket Seismograph

The clearest difference is in-app purchases: Pocket Seismograph at none against Vibration analysis's 2. Pocket Seismograph also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Vibration analysis sells 2 one-off in-app purchases. Pocket Seismograph asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Vibration analysis | Pocket Seismograph |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (43 ratings)](https://appshunter.io/ios/app/vibration-analysis/id817385888/reviews)** | — |
| Number of ratings | **43** | — |
| Positive reviews | 57.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 23 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) | [lapnito.cz s.r.o.](https://appshunter.io/developer/1577358577) |

## What reviewers say

### Vibration analysis

[App page](https://appshunter.io/ios/app/vibration-analysis/id817385888)

This app analyzes phone accelerometer data to create a vibration spectrum. It helps evaluate vibration strength, frequency, and the rotation speed of various mechanisms like fans and motors. Useful for quality checks, malfunction detection, and balancing homemade rotating parts.

**Highlights:** Vibration spectrum analysis, Rotation speed evaluation, Mechanism quality assessment, Malfunction monitoring, Customizable FFT size, Multiple units of measurement, Peak frequency detection

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Settings | $2.99 | one-time |
| External accelerometer | $2.99 | one-time |


### Pocket Seismograph

[App page](https://appshunter.io/ios/app/pocket-seismograph-vibration/id6766446046)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Vibration analysis free?

Vibration analysis is free to download, with in-app purchases available.

### Is Pocket Seismograph free?

Pocket Seismograph is free to download, with no in-app purchases.

### Do Vibration analysis or Pocket Seismograph have ads?

Neither Vibration analysis nor Pocket Seismograph shows ads.

### Which is updated more often, Vibration analysis or Pocket Seismograph?

Vibration analysis ships an update every 3 months, and Pocket Seismograph every 3 months. Most recently, Vibration analysis was updated on November 6, 2026 and Pocket Seismograph on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*